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Antiseptic Efficacy of A Soap Made from Biosurfactants Isolated from Bacillus and Lactobacillus against Pathogenic Bacteria

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Advances in Microbiology 2024年第1期14卷 31-58页

作者： Frédéric Yannick Okouakoua Christian Aimé Kayath Nicaise Saturnin Mokémiabeka Varelle Bervanie Ngala elenga Digne Nedjea N’goma-Mona Ndelani Nkalla Lambi sandra paola elenga wilson Christ Dieuveil Bayakissa Malanda Rodinet Tsana Junior Patrick Sergy Bissoko1 Moïse Doria Kaya-Ongoto Duchel Jeanedvi Kinavouidi Etienne Nguimbi Laboratoire de Biologie Cellulaire et Molé culaire (BCM) Facult&eacute des Sciences et Techniques Universit&eacute Marien N’gouabi Brazzaville Congo Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN) Avenue de l’Auberge Gascogne Brazzaville Congo

The aim of our study was to use a biosurfactant produced by Bacillus and Lactobacillus isolates as an antiseptic in the formulation of local soap. A total of 60 isolates were characterized by microbiological techniques (30 Bacillus and 30 Lactobacillus) and the ability to produce biosurfactants was demonstrated by a hydrocarbon emulsification index (E24). The emulsification indexes (E24) varied from 9% to 100% for Bacillus and from 33% to 100% for Lactobacillus as well. The antagonistic assay showed that biosurfactants were able to inhibit the formation of biofilms and growth of pathogens such as Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, Bacillus cereus, Salmonella typhirium, Shigella boydii and Proteus mirabilis. The biosurfactant consortium (BioC) from Bacillus consortium and from Lactobacillus was able to inhibit biofilm formation and the pathogens growth. The BioC was stable to alkaline pH and the temperatures stability of Biosurfactant was ranging from 50°C to 90°C. The soap was made by the cold saponification process using one biosurfactant consortium formulated. This soap has a pH of 10 and showed good cleaning power and good foam stability. Similarly, the soap showed good antiseptic power and disinfection power against all pathogens tested. Handwashing is critical to preventing disease transmission. The persistence of pathogens in waste water was evaluated. The BioS produced showed good disinfection power against all pathogens tested. The valor of reduction on the hands and in the waste water was significantly more than compared to the control soaps used. This soap could be used in the prevention, fighting, and treatment of bacterial and viral infections.

关键词： Antiseptic Soap Biosurfactants Bacillus Lactobacillus Disinfection Pathogens bacteria

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Prime Enzymatic Exocellular Background of Lysinibacillus louembei

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Advances in Microbiology 2020年第3期10卷 95-109页

作者： Moise Doria Kaya-Ongoto Christian Aimé Kayath Alain Brice Vouidibio Mbozo Gyna Mobandolaka Mitoko sandra paola elenga wilson Duchel Jeanedvi Kinouani Kinavouidi Etienne Nguimbi Laboratoire de Biologie Cellulaire et Moléculaire(BCM) Faculté des Sciences et TechniquesUniversité Marien NGOUABIBrazzavilleRépublique du Congo Institut National de Recherche en Sciences Exactes et Naturelles(IRSEN) Avenue de l’Auberge GascogneBrazzavilleCongo

Many high-reading journals reject several studies based on the basic aspects of microbiology by forgetting that this could open doors and windows of great scientific discoveries. A new spore-forming bacteria species called Lysinibacillus louembei has been previously discovered in our research unit. This new study aims to assess a real enzymatic machine produced with such bacteria. Using agarose mixed with half skimmed milk, LB medium supplemented with tween 20, Olive oil, egg yolk, cellulose, casein, pectin and starch, we showed that L. louembei has lipolytic, proteolytic (2.8 cm ± 0.1), cellulolytic, amylolytic pectinolytic activities, with percentage ranging from 30% to 80%. This species is able to secrete lipase, thermostable protease up to 60°C. Cellulase, pectinase and amylase are secreted with more stability between 30°C and 50°C with an optimum at 45°C. The effect of pH was determined after 24 h of incubation at 37°C and 50°C. The proteolytic activity is stable at pH 8 at 50°C. In addition to this first enzymatic landscape, L. louembei is able to degrade and/or tolerate gasoline and/or diesel fuel hydrocarbons in 36 hours. In this work, we also showed that L. louembei can produce biosurfactant in the presence of gasoline and SAE140 with the E24 up to 50%.

关键词： Lysinibacillus louembei Prime Enzymatic Exocellular Bacteria

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Epidemiological and Paraclinical Aspects of Helicobacter pylori Infection among Hepatitis B Virus Carriers in the Republic of Congo

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Open Journal of Gastroenterology 2024年第5期14卷 184-191页

作者： Jile Florient Mimiesse Monamou Nuptia Kanoha elenga Ngala Itoua Ngaporo Clausina Ahoui Apendi Marlyse Ngalessami Mouakosso Arnaud Mongo Onkouo Mauria Ibobi Rody Stéphane Ngami Mardoché Motoula Latou Hostaud Atipo Ibara Céline sandra Adoua Déby Gassaye Blaise Irénée Atipo Ibara Department of Gastroenterology and Internal Medicine Brazzaville University Hospital Brazzaville The Republic of Congo Faculty of Health Sciences Marien Ngouabi University Brazzaville The Republic of Congo

Objective: Describe the epidemiological and paraclinical aspects of HP infection in hepatitis B virus carriers. Population and Method: This was a descriptive cross-sectional study running from January 1 to August 30, 2019, a period of 8 months. It took place in the Hospital Centers of the two major cities of Congo (Brazzaville and Pointe-Noire). The target population of our study consists of patients carrying HBV under antiviral treatment or not. Patients aged at least 18 years and consenting with a biological and morphological assessment were included. We did not include in our study patients taking or having taken antibiotics and/or PPIs less than 4 weeks ago. We excluded all patients who did not deposit fresh stools and those in whom stool extraction could not be done manually. The variables studied covered sociodemographic, clinical and paraclinical aspects. Data entry was done using Excel 8.0 software. Statistical analysis was carried out with SPSS 20.0 software. Results: During our study, we included 169 patients. The frequency of HPAG in the stools of HBV carriers in our study population was 63.9% (n = 109). Male patients represented 69% (n = 75) and female patients represented 31% (n = 34). The average age of the patients is 43.92 ± 13.51 years with extremes of 18 years and 80 years. Concerning profession, unemployed patients and those working in the private sector were the most represented in respectively 28.4% (n = 31) and 22.9% (n = 25) without statistical link. Households comprising between 4 - 10 people and the use of public latrines were the risk factors most represented in respectively 69% (n = 75) and 88% (n = 96) without statistical link. Clinically, hepatomegaly and signs of portal hypertension were most represented in 53% (n = 58) and 47% (n = 51). Biologically, HBV DNA was detectable in 60.5% of cases (n = 66).

关键词： Helicobacter pylori Hepatitis B Virus Congo

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Allophane as a Nanotechnological Additive in Masonry Materials to Increase Resistance and Waterproofing

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Advances in Materials Physics and Chemistry 2024年第8期14卷 196-212页

作者： Edward H. Jiménez Joao Rivera Juan H. Villalba paola E. Vera Marlon Cuenca Belén Granja Javier Fuentes sandra Gavilanes Daniel Hidalgo Fernando Garcia Jose Bermudez Washington Ruiz Alexis Martial Debut Facultad de Ingeniera Qumica Universidad Central del Ecuador Quito Ecuador Facultad de Arquitectura y Urbanismo Universidad Central del Ecuador Quito Ecuador Nanomaterials Characterization Laboratory Universidad de las Fuerzas Armadas ESPE Sangolqu Ecuador

The constant need for high-strength materials in the construction industry promotes the research of additives that improve the properties of masonry materials. The use of allophane as an additive in concrete and mortar mixtures was implemented to improve their strength and waterproofing, respectively, using compression and water absorption tests according to their corresponding standards (ASTM C1231, ASTM D2938, and ASTM C1585). The samples were evaluated at different concentrations and curing ages. In addition, different sand/cement ratios were considered for the mortar. The results revealed that there was a 9.4% increase in compressive strength in concrete and a 23.7% reduction in water absorption in mortar for the 5:1 ratio. These changes would be the result of the interaction of the nanoporous additive in the atomic crystal structure of the material demonstrating the nanotechnological nature of allophane.

关键词： Allophane Nano Additive Strength Impermeability Concrete Mortar

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In search for novel strategies towards neuroprotection and neuroregeneration: is PPARα a promising therapeutic target?

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Neural Regeneration Research 2015年第9期10卷 1409-1412页

作者： sandra Moreno Maria paola Cerù Department of Science-LIME University Roma Tre Department of Life Health and Environmental Sciences University of L’AquilaCoppito (AQ) Italy

Peroxisome proliferator activated receptors： In the early 1990s, seminal work on rodent liver demonstrated that the hypolipidemic effect of xenobiotics, referred to as peroxisome proliferators, was mediated by a member of steroid hormone receptor superfamily, thus designated peroxisome proliferator-activated receptors （PPARs）（Issemann and Green, 1990; Dreyer et al., 1992）. The research field opened by this discovery led to the identification of three isotypes, namely PPARa （NR1C1）, PPAR[3/6 （NRIC2）, PPARy （NRIC3）, in a wide range of tissues. All these receptors act as ligand-activated transcription factors, binding lipid molecules with different, though overlapping, specificity.

关键词： PPAR a promising therapeutic target is PPAR

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An update on microbiological causes of canine otitis externa in Campania Region,Italy

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Asian Pacific Journal of Tropical Biomedicine 2016年第5期6卷 384-389页

作者： Luisa De Martino Francesca paola Nocera Karina Mallardo sandra Nizza Eleonora Masturzo Filomena Fiorito Giuseppe Iovane Piergiorgio Catalanotti Department of Veterinary Medicine and Animal Production University of Naples "Federico II" Department of Experimental Medicine Second University of Naples

Objective: To update the recent knowledge of the microbiological causes of canine otitis externa in Campania Region(Italy) and the antibiotic susceptibility patterns of the isolated ***: A total of 122 dogs were examined by otoscopy, and auricular swab samples were collected from both ears in 74 dogs presenting clinical bilateral otitis and from single ears in 48 dogs displaying clinical unilateral otitis. Cytological examination,bacteriological analysis and antimicrobial susceptibility tests were ***: Thirty-one out of 122 dogs were positive for yeast species(25.4%, 95% confidence interval(CI): 18.2%–34.2%) with a higher prevalence of Malassezia pachydermatis(21/31 isolates, 67.7%, CI: 48.5%–82.7%), and a total of 91 out of 122 dogs were positive for bacterial species(74.6%; CI: 65.8%–81.8%) with a higher prevalence of Staphylococcus pseudintermedius(45/143 isolates, 31.5%, CI: 24.1%–39.8%). These results are the first description of Streptococcus agalactiae-associated otitis. The yeasts isolated showed high levels of susceptibility to all antifungal agents tested; on the contrary all the isolated bacterial strains were highly resistant to at least four out of ten antimicrobial classes. Both Gram-positive and Gram-negative bacteria showed high resistance to amoxicillin/clavulanate and kanamycin hence they are not recommended as initial empirical therapy for the otitis ***: This update illustrates an increase in antibiotic resistances providing an insight into the current knowledge of the therapeutic procedures followed on canine otitis externa in Italy. It also emphasizes the importance of considering the results of the microbiological and sensitivity tests to decide on an appropriate antibiotic therapy.

关键词： Canine otitis externa Malassezia pachydermatis Staphylococcus pseudintermedius Antimicrobial resistance

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Evaluation of a Fermented Millet Product of Bacillus subtilis ATCC 55033 as Potential in Biocontrol of Bacteriosis(Xanthomonas axonopodis)in Gulupa(Passiflora edulis Sims)

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Journal of Agricultural Science and Technology(A) 2020年第4期10卷 200-215页

作者： Benitez Hernández Solange Viviana Aragón Rojas Stephania Novoa Sindy Madrigal sandra Núñez Paula Gómez paola Montenegro Monica Ordoñez Elizabeth Lancheros Graciela Sánchez Ligia Universidad Colegio Mayor de Cundinamarca Facultad de Ciencias de la SaludPrograma de BacteriologíaCalle 28 No.5B-02BogotáColombia Universidad de la Sabana Facultad de IngenieríaPrograma de Doctorado en BiocienciasCampus del Puente del ComúnKm.7Autopista Norte de BogotáChíaCundinamarcaColombia

The“oil stain disease”has become a phytosanitary status that involves economic losses for farmers who produce gulupa(Passiflora edulis Sims).For this reason,this research aimed to evaluate the biocontrol activity of Bacillus subtilis ATCC 55033 in a culture medium based on fermented millet as a biocontrol product of the ***,metabolite production of seven strains of *** and a reference strain B.s(ATCC 55033)was evaluated;in addition,the in vitro antagonistic ability was evaluated against Xanthomonas *** experiments were performed under in vitro conditions:(1)study of the presence of halos of hemolysis due to metabolite production;(2)analysis of the antagonistic ability by using double *** was observed that concerning the average,a number five times bigger of halos of hemolysis and 10 times bigger halos of inhibition in vitro on the growth of *** in the strains B.s(ATCC 55033)and B.s TB2 over other ***,the evaluation was performed under greenhouse conditions,based on a randomized block design,in which two treatments were applied over the soil:(1)application of the fermented medium based on millet with B.s ATCC 55033,24 h before X.a inoculation;(2)application of 5 d *** was observed that the treatment,previous infective process,obtained an average percentage of severity equal to 42.044%.In addition,after the evaluation month,a foliage restoration was *** conclusion,it is suggested that these products could act as inducers in the plant systemic resistance to trigger defense responses to infection of X.a.

关键词： Xanthomonas Bacillus biocontrol bacterioses.

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